In the years following World War II, the allies occupied a shattered Germany. Britain held North-Western Germany for ten years, overseeing the rehabilitation of 'the biggest single forced population movement in modern history', as Germans from around Europe were expelled from the crumbling Third Reich. This was a humanitarian crisis - with most hospitals, houses, transport networks and schools destroyed during the war, and the British and Americans running enormous and often inhumane refugee camps. Here, Francis Graham-Dixon assesses how the British squared their ethical focus on liberalism...